1.

Find the value of the polynomial `5x-4x^(2)+3` at : `(i)x=0 " " (ii) x=-1 " " (iii) x=2`

Answer» Let `p(x)=5x-4x^(2)+3`
(i) The value of `p(x)=5x-4x^(2)+3 " at" x=0 " is"`
`p(0)=5xx0-4xx0^(2)+3`
`implies p(0)=3`
(ii) The value of `p(x)=5x-4x^(2)+3 " at" x=-1 ` is
`p(-1)=5(-1)-4(-1)^(2)+3=-5-4+3`
`implies p(-1)=-6`
(iii) The value of `p(x)=5x-4x^(2)+3 " at" x=2` is
`p(2)=5(2)-4(2)^(2)+3=10-16+3`
`implies p(2)=-3`


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